Combination-tool



(No Model.)

0. ENGMAN.

COMBINATION TOOL. No. 569,963 Patented Oct. 20,1896.

UNITE STATES PATENT OFFICE.

OLOF ENGMAN, OF KEYVANEE, ILLINOIS.

COMBINATION-TOOL.

SPECIFICATION forming part of Letters Patent No. 569,963, dated October20, 1896.

Application filed May 2, 1896.

To all whom it may concern.-

Be it known that I, OLOF ENGMAN, a citizen of Sweden, residing atKewanee, in the county of Henry and State of Illinois, have inventedcertain new and useful Improvements in a Combined Square, Level, and T-Square; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to improvements in a combined square, level, andT-square.

The object of this invention is to produce a compact instrument of thisclass which is inexpensive to manufacture and which can be readily usedfor a variety of purposes by carpenters, mechanics, (to.

A further and more essential object is to provide, in connection withthe ordinary carpenters square and level, an adjustable T- square, whichlatter may be, by means of a dial, quickly adjusted to any angledesired.

For a full and complete understanding of my invention reference is to behad to the accompanying drawings, wherein corresponding letters indicatelike parts in the several views, and in which Figure 1 is a generalperspective view of the device complete, different positions of theT-square being indicated in dotted lines. Fig.2 is a view in detail ofthe metal part of the square, metal strips, and wooden casing beforethey are secured together. Fig. 3 is a view of the dial and securingdevice for securing the T-square at any angle desired.

In the drawings, A refers to the metal part of the square, whichconsists of the two arms A A formed of a single piece of metal, at rightangles with respect to each other, as shown, the arm A having lugs a,formed at certain intervals on its upper edge, also a cut-away portion afor a level, as hereinafter referred to, also lugs a 011 its lower edge.It also has a slot a running nearly its entire length from its outerend, near to and parallel to its edges, and apertures a in its outerend.

B refers to a wooden casing of rectangular form having one of its uppercorners cut away at b and its opposite end vertical edges rounded awayat b. Extending from the cut- Serial No. 589,963. (No model.)

away end Z) centrally and vertically to within a short distance from therounded end I) is a slot 5 (see Fig. 2,) which terminates in a circularaperture or well 19 extending from the upper surface of the casing tothe bottom thereof.

b is a horizontal slot in the casing near the bottom thereof, extendingfrom the rounded end nearly to the opposite end thereof and through thecasing.

In the rounded end of the casing, near the upper surface thereof, is anaperture I), cut away and forming an opening into the well b for apurpose hereinafter described.

0 O are two metallic plates of the dimensions of the upper and lowersurfaces, respectively, of the casin g, and having apertures c cand lipsc depressed therein, which correspond with the lugs a a for securing theplates on the upper and lower surfaces of the casing by said lugspassing through these apertures and being bent inwardly against saidlips to lie flush with the surfaces of the plates, the arm A of thesquare A being first inserted in the slot 19 so that holes or aperturesa in the outer end thereof register with apertures b, which passhorizontally through the casing adjacent to the well b as shown.

The slots a and b are so arranged that they register with each other,and rivets or screws are passed through the apertures or holes w' b tosecurely retain the square in the casing.

Plate 0 is slightly enlarged and rounding at its rear end, and has adial 0 accurately marked thereon in degrees from 0 up to (C 77 D is anarm of the T-square, which is of the same dimension and fits withintheslots a and b, one end of which is suitably secured to revolve with apost E, mounted in any well-known manner in the well 19 between theplates 0 O, and having an upper pivotal point extending upwardcentrally" through the dial-plate, with an index-finger F thereon. Thisindex-finger lies in the same vertical plane with the arm D, and as thatarm is revolved out of the casing the index-finger, being also rigidlyattached to the post E, follows in the same vertical plane, therebyindicating accurately the angle which the arm makes with respect to thecasing. Over aperture b is a protecting-plate G of rounding contour tofit the end of the casing, and this plate has apertures g, which whenthe plate is in position register With the apertures a and b to fastenthe same to the end of the casin g. This plate has also in its centralportion a threaded hole, through which Works a thumb-screw or threadedsecuring device H, which when screwed inwardly brings its inner end incontact with the post E to hold the same securely in any desiredposition.

The lower side edges of the casing are marked or graded with suitablescales, also the arm D, and the casing is cut away at I to correspondwith the cut away portion a in the arm A of the square for securing in asuitable manner a level therein.

Having thus described myinvention, what I desire to secure by LettersPatent is- A combined square, level, and T-square, comprising a metallicsquare having upon the upper and lower edges of one arm, lugs, ahorizontal slot extending from the outer end nearly to its opposite end,a cut-away recess upon its upper edge near the middle thereof, andapertures in its outer end, a casing having a centrally and verticallyformed slot extending from a cut-away end corner to avertically-formedwell in its opposite end, in which the arm of the square with the lugsfits, a slot in the casing corresponding to and in the same horizontalplane with said first slot, plates having apertures Withinwardly-projecting lips thereon, registering with the lugs-on theplates, and secured thereto upon the upper and lower surfaces of thecasing, a dial upon the outer end of the upper plate, a post in the Wellin the casing, an index-finger secured to the upper end of the post torevolve over said dial, a T-square arm fitting in said slots in thecasing and square, and having its inner end securely attached to revolvewith said post and dial, an opening in the rear end of the casing andWell, a plate secured over said opening, a screw-threaded aperture inthis plate and a thumb-screw in said aperture to hold the post in anydesired position, and a level in the upper surface of the casing,substantially as described and set forth.

In testimony whereof I affix my signature in presence of two witnesses.

OLOF ENGMAN. lVitnesses:

A. J. SERENE, WILLIAM LAWSON.

